USENIX Security Symposium

In this paper, we seek to answer a simple question: "How prevalent are denial-of-service attacks in the Internet today ?". Our motivation is to understand quantitatively the nature of the current threat as well as to enable longerterm analyses of trends and recurring patterns of attacks. We present a new technique, called "backscatter analysis ", that provides an estimate of worldwide denial-ofservice activity. We use this approach on three week-long datasets to assess the number, duration and focus of attacks, and to characterize their behavior. During this period, we observe more than 12,000 attacks against more than 5,000 distinct targets, ranging from well known…

• NS
  National Science Foundation

  Award: 9711092
• DA
  Defense Advanced Research Projects Agency
• UO
  University of California, San Diego